Analysis and Control of Synchronous Rectification for MHz Class-E Resonant Rectifier with Load Variation

2021 ◽  
Author(s):  
Gyu Cheol Lim ◽  
Gwangyol Noh ◽  
Jung-Ik Ha
Keyword(s):  
Load Variation ◽  
Synchronous Rectification ◽  
And Control ◽  
Class E

Cutting Force Adapted Control Application in Micropositioned Machining

2009 ◽  
Vol 3 (3) ◽  
pp. 263-270
Author(s):  
Joon Hwang ◽  
◽  
Eui-Sik Chung ◽  
Keyword(s):  
Cutting Force ◽  
Machining Process ◽  
Cutter Runout ◽  
Low Friction ◽  
Integral Control ◽  
Load Variation ◽  
Proportional Integral Control ◽  
Control Application ◽  
And Control ◽  
Chip Load

In the machining process, cutting force is a physical quantity well reflecting the process itself. Measured cutting force is used to identify the tool wear, surface roughness, chip formation, chatter stability and dynamic cutter runout problems. The cutting force linearity is used to measure and control the irregular cutting phenomena and machining process. We applied force-adaptive cutting control technology to evaluate chatter and real-time compensation for dynamic cutter runout. We proposed the concept of force-adaptive cutting control in the angle domain based upon proportional-integral control to control chip-load variation in machining. The micropositioning control of cutting tool or workpiece positioning using a low-friction sliding table and piezoelectric actuator changed the chip-load variation. Our results are expected to provide invaluable information in precision machining technology.

Optimised class-E amplifier with load variation

1987 ◽  
Vol 23 (18) ◽  
pp. 973 ◽  
Author(s):  
D. Collins ◽  
S. Hinchliffe ◽  
L. Hobson
Keyword(s):  
Load Variation ◽  
Class E

scholarly journals Normalized statical analysis with frequency and load variation for the class-E converter based on piezoelectric transformers

2011 ◽  
Vol 22 (6) ◽  
pp. 573-584
Author(s):  
Raffael Engleitner ◽  
José Renes Pinheiro ◽  
Fábio Ecke Bisogno ◽  
Matthias Radecker ◽  
Yujia Yangy
Keyword(s):  
Duty Cycle ◽  
Power Supplies ◽  
Equivalent Model ◽  
Design Parameters ◽  
Frequency Variation ◽  
Switching Frequency ◽  
Load Variation ◽  
High Transformation ◽  
Piezoelectric Transformers ◽  
Class E

Piezoelectric transformers (PTs) allow the design of promising power supply applications, increasing efficiency, reducing size, facilitating the achievement of high transformation ratio, besides providing high immunity against electromagnetic noise. Due to the electrical equivalent model having resonant characteristics, some resonant topologies are used to build these power supplies, i.e. the Class-E converter. In order to make easier the analysis of high order converters, it's possible to use a normalized analysis method. The control of the Class-E converter using PTs is implemented through the switching frequency and duty cycle variation. The static gain is achieved though the switching frequency variation, while the duty cycle is adjusted with the purpose of achieving soft switching for different frequencies and loads. This paper shows a normalized analysis of this process, including a normalized frequency and load variation, without the need of design parameters. Experimental results for a 3W step-down converter are shown for a universal 85-260VAC input and out put voltage 6 V DC, to validate the proposed method.

scholarly journals Analysis and Control of STATCOM/SMES Compensator in a Load Variation Conditions

2014 ◽  
Vol 12 (5) ◽  
Author(s):  
Mahmoud Reza Shakarami ◽  
Reza Sedaghati ◽  
Mohammad Bagher Haddadi
Keyword(s):  
Load Variation ◽  
And Control

scholarly journals High-Efficiency Design and Control of Zeta Inverter for Single-Phase Grid-Connected Applications

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 974 ◽  
Author(s):  
Woo-Young Choi ◽  
Min-Kwon Yang
Keyword(s):  
Single Phase ◽  
High Efficiency ◽  
Field Effect Transistors ◽  
The Body ◽  
Switching Frequency ◽  
Switching Losses ◽  
High Switching Frequency ◽  
Active Clamp ◽  
Synchronous Rectification ◽  
And Control

The conventional zeta inverter has been used for single-phase grid-connected applications. However, it has high switching losses to operate at high switching frequency in the continuous conduction mode (CCM). To address this drawback, this paper suggests a high-efficiency zeta inverter using active clamp and synchronous rectification techniques. The proposed inverter utilizes the active clamp circuit for reducing switching losses. The non-complementary switching scheme is adopted for not only clamping the switch voltage stresses, but also alleviating the circulating energy. In addition, the synchronous rectification is implemented for reducing the body diode conduction of power switches. By using the silicon carbide (SiC) metal oxide semiconductor field effect transistors (MOSFETs), the switching performance of the proposed inverter is improved. Its operation principle and control strategy are presented. A 220-W prototype has been designed and tested to evaluate the performance of the proposed inverter.

Sign in / Sign up

Export Citation Format

Share Document